321350400523521 has 12 divisors (see below), whose sum is σ = 465575135506000. Its totient is φ = 213586368926040.

The previous prime is 321350400523517. The next prime is 321350400523571. The reversal of 321350400523521 is 125325004053123.

321350400523521 is a `hidden beast` number, since 3 + 2 + 13 + 5 + 0 + 400 + 5 + 235 + 2 + 1 = 666.

It is not a de Polignac number, because 321350400523521 - 2² = 321350400523517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321350400523511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53935948771 + ... + 53935954728.

Almost surely, 2^{321350400523521} is an apocalyptic number.

It is an amenable number.

321350400523521 is a deficient number, since it is larger than the sum of its proper divisors (144224734982479).

321350400523521 is a wasteful number, since it uses less digits than its factorization.

321350400523521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107871903836 (or 107871903833 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 36.

Adding to 321350400523521 its reverse (125325004053123), we get a palindrome (446675404576644).

The spelling of 321350400523521 in words is "three hundred twenty-one trillion, three hundred fifty billion, four hundred million, five hundred twenty-three thousand, five hundred twenty-one".